Features (cid:129) Fast read access time – 55ns (cid:129) Low-power CMOS operation – 100µA max standby – 25mA max active at 5MHz (cid:129) JEDEC standard packages – 32-lead PDIP – 32-lead PLCC (cid:129) 5V 10% supply 2Mb (256K x 8) (cid:129) High-reliability CMOS technology One-time – 2,000V ESD protection Programmable, – 200mA latchup immunity (cid:129) Rapid programming algorithm – 100µs/byte (typical) Read-only Memory (cid:129) CMOS- and TTL-compatible inputs and outputs (cid:129) Integrated product identification code (cid:129) Industrial and automotive temperature ranges Atmel AT27C020 (cid:129) Green (Pb/halide-free) packaging option 1. Description The Atmel® AT27C020 is a low-power, high-performance, 2,097,152-bit, one-time pro- grammable, read-only memory (OTP EPROM) organized as 256K by 8 bits. It requires only one 5V power supply in normal read mode operation. Any byte can be accessed in less than 55ns, eliminating the need for speed-reducing WAIT states on high-performance micropro- cessor systems. In read mode, the AT27C020 typically consumes 8mA. Standby mode supply current is typically less than 10µA. The AT27C020 is available in a choice of industry-standard, JEDEC approved, one-time pro- grammable (OTP) PDIP and PLCC packages. All devices feature two-line control (CE, OE) to give designers the flexibility to prevent bus contention. With 256K byte storage capability, the AT27C020 allows firmware to be stored reliably and to be accessed by the system without the delays of mass storage media. The AT27C020 has additional features to ensure high quality and efficient production use. The rapid programming algorithm reduces the time required to program the part and guar- antees reliable programming. Programming time is typically only 100µs/byte. The integrated product identification code electronically identifies the device and manufacturer. This feature is used by industry standard programming equipment to select the proper pro- gramming algorithms and voltages. 0570H–EPROM–4/11

2. Pin configurations Pin name Function 32-lead PLCC 32-lead PDIP Top view Top view A0 - A17 Addresses O0 - O7 Outputs 12 15 16 PP CC GM 17 VPP 1 32 VCC A A A V V P A A16 2 31 PGM CE Chip enable 4 3 2 1 2 1 0 A15 3 30 A17 3 3 3 OE Output enable A7 5 29 A14 A12 4 29 A14 A6 6 28 A13 A7 5 28 A13 PGM Program strobe A5 7 27 A8 A6 6 27 A8 A4 8 26 A9 A5 7 26 A9 A3 9 25 A11 A4 8 25 A11 A2 10 24 OE A3 9 24 OE A1 11 23 A10 A2 10 23 A10 A0 12 22 CE A1 11 22 CE O0 134 5 6 7 8 9 021 07 A0 12 21 07 1 1 1 1 1 1 2 O0 13 20 06 1 2 D 3 4 5 6 O1 14 19 05 0 0 N 0 0 0 0 G O2 15 18 04 GND 16 17 03 3. System considerations Switching between active and standby conditions via the chip enable pin may produce transient voltage excursions. Unless accommodated by the system design, these transients may exceed datasheet limits, resulting in device nonconformance. At a minimum, a 0.1µF, high-frequency, low inherent inductance, ceramic capacitor should be utilized for each device. This capacitor should be connected between the V and ground terminals of the device, as close to the device as possible. CC Additionally, to stabilize the supply voltage level on printed circuit boards with large EPROM arrays, a 4.7µF bulk electrolytic capacitor should be utilized, again connected between the V and ground terminals. This capacitor should be positioned as CC close as possible to the point where the power supply is connected to the array. Figure 3-1. Block diagram Atmel AT27C020 2 0570H–EPROM–4/11

Atmel AT27C020 4. Absolute maximum ratings* Temperature under bias. . . . . . . . . . . . . .-55°C to +125°C *NOTICE: Stresses beyond those listed under “Absolute maximum ratings” may cause permanent damage to the device. This is a stress rating only, and functional Storage temperature. . . . . . . . . . . . . . . . .-65°C to +150°C operation of the device at these or any other conditions beyond those indicated in the operational sections of Voltage on any pin with this specification is not implied. Exposure to absolute respect to ground. . . . . . . . . . . . . . . . . . . -2.0V to +7.0V(1) maximum rating conditions for extended periods may affect device reliability. Voltage on A9 with respect to ground . . . . . . . . . . . . . . . . .-2.0V to +14.0V(1) V supply voltage with PP respect to ground. . . . . . . . . . . . . . . . . .-2.0V to +14.0V(1) Note: 1. Minimum voltage is -0.6V DC, which may undershoot to -2.0V for pulses of less than 20ns. Maximum output pin voltage is V + 0.75V DC, which may overshoot to +7.0V for pulses of less than 20ns. CC 5. DC and AC characteristics Table 5-1. Operating modes Mode/Pin CE OE PGM Ai V Outputs PP Read V V X(1) Ai X D IL IL OUT Output disable X V X X X High-Z IH Standby V X X X X High-Z IH Rapid program(2) V V V Ai V D IL IH IL PP IN PGM verify V V V Ai V D IL IL IH PP OUT PGM inhibit V X X X V High-Z IH PP A9 = V (3) H Product identification(4) V V X A0 = V or V X Identification code IL IL IH IL A1 - A17 = V IL Notes: 1. X can be V or V . IL IH 2. Refer to programming characteristics. 3. V = 12.0 ± 0.5V. H 4. Two identifier bytes may be selected. All Ai inputs are held low (V ) except A9, which is set to V , and A0, which is tog- IL H gled low (V ) to select the manufacturer’s identification byte and high (V ) to select the device code byte. IL IH Table 5-2. DC and AC operating conditions for read operation Atmel AT27C020 -55 -90 Ind. -40C - 85C -40C - 85C Operating temperature (case) Auto. -40C - 125C V power supply 5V 10% 5V 10% CC 3 0570H–EPROM–4/11

Table 5-3. DC and operating characteristics for read operation Symbol Parameter Condition Min Max Units I Input load current V = 0V to V (Com., Ind.) ±1.0 µA LI IN CC I Output leakage current V = 0V to V (Com., Ind.) ±5.0 µA LO OUT CC I (2) V (1) read/standby current V = V ±10 µA PP PP PP CC I (CMOS), CE = V  0.3V 100 µA I V (1) standby current SB1 CC SB CC I (TTL), CE = 2.0 to V + 0.5V 1.0 mA SB2 CC I V active current f = 5MHz, I = 0mA, CE = V 25 mA CC CC OUT IL V Input low voltage -0.6 0.8 V IL V Input high voltage 2.0 V + 0.5 V IH CC V Output low voltage I = 2.1mA 0.4 V OL OL V Output high voltage I = -400µA 2.4 V OH OH Notes: 1. V must be applied simultaneously or before V , and removed simultaneously or after V CC PP PP 2. V may be connected directly to V except during programming. The supply current would then be the sum of I and PP CC CC I . PP Table 5-4. AC characteristics for read operation Atmel AT27C020 -55 -90 Symbol Parameter Condition Min Max Min Max Units CE = OE t (3) Address to output delay 55 90 ns ACC = V IL t (2) CE to output delay OE = V 55 90 ns CE IL t (2)(3) OE to output delay CE = V 20 35 ns OE IL OE or CE high to output float, t (4)(5) 18 20 ns DF Whichever occurred first Output hold from address, CE or OE, t 7 0 ns OH Whichever occurred first Atmel AT27C020 4 0570H–EPROM–4/11

Atmel AT27C020 Figure 5-1. AC waveforms for read operation(1) Notes: 1. Timing measurement references are 0.8V and 2.0V. Input AC drive levels are 0.45V and 2.4V, unless otherwise specified. 2. OE may be delayed up to t - t after the falling edge of CE without impact on t . CE OE CE 3. OE may be delayed up to t - t after the address is valid without impact on t . ACC OE ACC 4. This parameter is only sampled, and is not 100% tested. 5. Output float is defined as the point when data is no longer driven. Figure 5-2. Input test waveforms and measurement levels For -55 devices only: 3.0V AC AC DRIVING 1.5V MEASUREMENT LEVELS LEVEL 0.0V t , t < 5ns (10% to 90%) R F For -90 devices only: t , t < 20ns (10% to 90%) R F Figure 5-3. Output test load Note: CL = 100pF including jig capacitance, except -55 devices, where CL = 30pF 5 0570H–EPROM–4/11

Table 5-5. Pin capacitance f = 1MHz, T = 25C(1) Symbol Typ Max Units Conditions C 4 8 pF V = 0V IN IN C 8 12 pF V = 0V OUT OUT Note: 1. Typical values for nominal supply voltage. This parameter is only sampled, and is not 100% tested. Figure 5-4. Programming waveforms (1) Note: 1. The input timing reference is 0.8V for V and 2.0V for V . IL IH 2. t and t are characteristics of the device, but must be accommodated by the programmer OE DFP 3. When programming the Atmel AT27C020, a 0.1µF capacitor is required across V and ground to suppress voltage PP transients Atmel AT27C020 6 0570H–EPROM–4/11

Atmel AT27C020 Table 5-6. DC programming characteristics T = 25 ± 5°C, V = 6.5 ± 0.25V, V = 13.0 ± 0.25V A CC PP Limits Symbol Parameter Test conditions Min Max Units I Input load current V = V , V 10 µA LI IN IL IH V Input low level -0.6 0.8 V IL V Input high level 2.0 V + 1.0 V IH CC V Output low voltage I = 2.1mA 0.4 V OL OL V Output high voltage I = -400µA 2.4 V OH OH I V supply current (program and verify) 40 mA CC2 CC I V supply current CE = PGM = V 20 mA PP2 PP IL V A9 product identification voltage 11.5 12.5 V ID Table 5-7. AC programming characteristics T = 25 ± 5°C, V = 6.5 ± 0.25V,V = 13.0 ± 0.25V A CC PP Limits Symbol Parameter Test condition (1) Min Max Units t Address setup time 2 µs AS t CE setup time 2 µs CES t OE setup time Input rise and fall times: 2 µs OES (10% to 90%) 20ns t Data setup time 2 µs DS t Address hold time 0 µs AH Input pulse levels: t Data hold time 0.45V to 2.4V 2 µs DH t OE high to output float delay(2) 0 130 ns DFP Input timing reference level: t V setup time 2 µs VPS PP 0.8V to 2.0V t V setup time 2 µs VCS CC t PGM program pulse width(3) Output timing reference level: 95 105 µs PW 0.8V to 2.0V t Data valid from OE 150 ns OE V pulse rise time during t PP 50 ns PRT programming Notes: 1. V must be applied simultaneously with or before V and removed simultaneously with or after V . CC PP PP 2. This parameter is only sampled and is not 100% tested. Output float is defined as the point where data is no longer driven. See timing diagram. 3. Program pulse width tolerance is 100µs ± 5%. 7 0570H–EPROM–4/11

Table 5-8. The Atmel AT27C020 integrated product identification code Pins Codes A0 O7 O6 O5 O4 O3 O2 O1 O0 Hex data Manufacturer 0 0 0 0 1 1 1 1 0 1E Device type 1 1 0 0 0 0 1 1 0 86 6. Rapidprogramming algorithm A 100µs PGM pulse width is used to program. The address is set to the first location. V is raised to 6.5V and V is raised CC PP to 13.0V. Each address is first programmed with one 100µs PGM pulse without verification. Then a verification/reprogramming loop is executed for each address. In the event a byte fails to pass verification, up to 10 successive 100µs pulses are applied with a verification after each pulse. If the byte fails to verify after 10 pulses have been applied, the part is considered failed. After the byte verifies properly, the next address is selected until all have been checked. V is then lowered to 5.0V and V to 5.0V. All bytes are read again and compared with the original data to PP CC determine if the device passes or fails. Atmel AT27C020 8 0570H–EPROM–4/11

Atmel AT27C020 Figure 6-1. Rapid programming algorithm 9 0570H–EPROM–4/11

7. Ordering information Green package (Pb/halide-free) I (mA) t CC ACC (ns) Active Standby Atmel ordering code Package Lead finish Operation range AT27C020-55JU 32J Matte tin Industrial 55 25 0.1 AT27C020-55PU 32P6 Matte Tin (-40C to 85C) AT27C020-90JU 32J Matte tin Industrial 90 25 0.1 AT27C020-90PU 32P6 Matte tin (-40C to 85C) Package type 32J 32-lead, plastic, J-leaded chip carrier (PLCC) 32P6 32-lead, 0.600" wide, plastic, dual inline package (PDIP) Atmel AT27C020 10 0570H–EPROM–4/11

Atmel AT27C020 8. Packaging information 32J – PLCC 1.14(0.045) X 45° PIN NO. 1 1.14(0.045) X 45° IDENTIFIER 0.318(0.0125) 0.191(0.0075) E1 E B1 E2 B e A2 D1 A1 D A 0.51(0.020)MAX 45° MAX (3X) COMMON DIMENSIONS (Unit of measure = mm) SYMBOL MIN NOM MAX NOTE D2 A 3.175 – 3.556 A1 1.524 – 2.413 A2 0.381 – – D 12.319 – 12.573 D1 11.354 – 11.506 Note 2 D2 9.906 – 10.922 Notes: 1. This package conforms to JEDEC reference MS-016, Variation AE. E 14.859 – 15.113 2. Dimensions D1 and E1 do not include mold protrusion. Allowable protrusion is .010"(0.254mm) per side. Dimension D1 E1 13.894 – 14.046 Note 2 and E1 include mold mismatch and are measured at the extreme E2 12.471 – 13.487 material condition at the upper or lower parting line. 3. Lead coplanarity is 0.004" (0.10mm) maximum. B 0.660 – 0.813 B1 0.330 – 0.533 e 1.270 TYP 10/04/01 TITLE DRAWING NO. REV. Package Drawing Contact: 32J, 32-lead, Plastic J-leaded Chip Carrier (PLCC) packagedrawings@atmel.com 32J B 11 0570H–EPROM–4/11

32P6 – PDIP D PIN 1 E1 A SEATING PLANE A1 L B B1 e E COMMON DIMENSIONS 0º ~ 15º REF (Unit of Measure = mm) C SYMBOL MIN NOM MAX NOTE eB A – – 4.826 A1 0.381 – – D 41.783 – 42.291 Note 1 E 15.240 – 15.875 E1 13.462 – 13.970 Note 1 B 0.356 – 0.559 B1 1.041 – 1.651 Note: 1. Dimensions D and E1 do not include mold Flash or Protrusion. Mold Flash or Protrusion shall not exceed 0.25mm (0.010"). L 3.048 – 3.556 C 0.203 – 0.381 eB 15.494 – 17.526 e 2.540 TYP 09/28/01 TITLE DRAWING NO. REV. Package Drawing Contact: 32P6, 32-lead (0.600"/15.24mm wide) Plastic Dual packagedrawings@atmel.com 32P6 B Inline Package (PDIP) Atmel AT27C020 12 0570H–EPROM–4/11

Atmel AT27C020 9. Revision history Doc. Rev. Date Comments 0570H 04/2011 Remove TSOP package Add lead finish to ordering information 0570G 12/2007 13 0570H–EPROM–4/11

Atmel Corporation Atmel Asia Limited Atmel Munich GmbH Atmel Japan 2325 Orchard Parkway Unit 01-5 & 16, 19F Business Campus 9F, Tonetsu Shinkawa Bldg. San Jose, CA 95131 BEA Tower, Millennium City 5 Parkring 4 1-24-8 Shinkawa USA 418 Kwun Tong Road D-85748 Garching b. Munich Chuo-ku, Tokyo 104-0033 Tel: (+1) (408) 441-0311 Kwun Tong, Kowloon GERMANY JAPAN Fax: (+1) (408) 487-2600 HONG KONG Tel: (+49) 89-31970-0 Tel: (+81) (3) 3523-3551 www.atmel.com Tel: (+852) 2245-6100 Fax: (+49) 89-3194621 Fax: (+81) (3) 3523-7581 Fax: (+852) 2722-1369 © 2011 Atmel Corporation. All rights reserved. / Rev.: 0570H–EPROM–4/11 Atmel®, logo and combinations thereof, and others are registered trademarks or trademarks of Atmel Corporation or its subsidiaries. Other terms and product names may be trade- marks of others. Disclaimer: The information in this document is provided in connection with Atmel products. No license, express or implied, by estoppel or otherwise, to any intellectual property right is granted by this document or in connection with the sale of Atmel products. EXCEPT AS SET FORTH IN THE ATMEL TERMS AND CONDITIONS OF SALES LOCATED ON THE ATMEL WEBSITE, ATMEL ASSUMES NO LIABILITY WHATSOEVER AND DISCLAIMS ANY EXPRESS, IMPLIED OR STATUTORY WARRANTY RELATING TO ITS PRODUCTS INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT, CONSEQUENTIAL, PUNITIVE, SPECIAL OR INCIDENTAL DAMAGES (INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOSS AND PROFITS, BUSINESS INTERRUPTION, OR LOSS OF INFORMATION) ARISING OUT OF THE USE OR INABILITY TO USE THIS DOCUMENT, EVEN IF ATMEL HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. Atmel makes no representations or warranties with respect to the accuracy or completeness of the contents of this document and reserves the right to make changes to specifications and products descriptions at any time without notice. Atmel does not make any commitment to update the information contained herein. Unless specifically provided otherwise, Atmel products are not suitable for, and shall not be used in, automotive applications. Atmel products are not intended, authorized, or warranted for use as components in applications intended to support or sustain life.

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